Draw-gear.



J. F. common.

DRAW GEAR. APPLIUATIOIN'IILED IEB.21, 19 10.

Patented 0013. 24, 1911.

2 SHEETS-SHEET 1.

Coy/r3022 UNITED STATES PATENT mirror.

JOHN-r. occasion, or PITCAIRN, rnnnsrnvamail .nnawnnan;

To all whom it If .I N,

Beit .known'tha "I, John F.

citizenof the United States, residing at. Pitcairn, Pennsylvania, "have invented certainnew and useful Im rove'ments, in Draw- Gears, "of which the ollo'wing isa specificalllOIL' '1 My present invention is an-improvementupon-the ,form of drawfgear' disclosed Letters Patent of the United States granted to me August 17, 1.909, #931,682, and it con-,. sists in the features and combination and'ar rangement' of'part-s' hereinafter described and particularly pointed out in the claims. In the accompanying drawingsa Figure 1 is a sectional view. through adraw :gear apparatus embodying my invention; Fig. .2 is a cross sectional view on line 22 of Fig. 1; Fig..3'is a cross sectional view similar to Fig. 2'of a modification in which fourouter friction blocks are used instead of two; Fig. 4 is a view of another form of my invention adapted to go into the short space.

now occupied by the "buffin spring in the wooden car construction; Fig. 4 is a view similar to, Fig. 4 with the parts thereof in the closed position due to bufiing or pullin Fig. 5 is a-view of another form. Figs. 6,

8 and 9 are views ofdetails. i

Referring to Figs. 1 and 2, 1 indicates the bufiing block which receives the presblocks 5 which are interposed between the wedge block 6 and the friction blocks 7, having for this purpose inner or rear inclinedfaces 8 bearingoncorresponding inclines on the centrally arranged wedge block 6 and inclines on their end oroutwardly directed faces 9' bearing correspondingancllnes, of the friction members 7 There maybe any desired numbcrof the friction blocks? located at difl'erent points about the wedge member 6, and these friction members 7 have teeth with inclined'faces 10 fitting against corresponding inclines or teeth of the central wedge member 6. 'The friction blocks and wedges are inclosed within a cylinder 11,'which bears at its rear end upon a follower 12 which, in turn, bears upon back in'der 11} totake. upulling strains.) 5

. the lackening} movementofrth'e same, the;

Specification of Letters Patent: Application filed Fehruaryfl, 1910. Serial-1w. m, 1a.1 j=

' stops: 13 fixed sills; buflin'g'i 55. spring 14: within the cylinder; bears at; one 1 end upon the central wed'gabloclr-ifi, aneuryits other. end upon therrearywall fofthe c upposing' the-'parts'lare subjected to bufiing'in 'c'ouplin v-thejcars, the.;.,= P Lbufiing'blockfl will forc rearwardly, causing-,iby its inc1ines,.a separation"oroutwe rd movement of the wedge blocks '5, and

the incline faces of? these blocks; at 8. andj 9,'i workingnpon the "iplonding inclines" of t e e uer lr. block mo'ves rearwardly in -o'ppos'ite diree thenv after this continued pressure froinxthe 1 the friction blocks 7'to be exerted between the inclined wall of the cylinder and the inclinesl of the inner. wedge block '6 that the I saidb locks 7 will be forced inwardly down,

.the inclines of the inner'block 6, owing to these 'being steeper than the incline ofthe cylinder' wall, and the device. as a. whole:

will move into the cylinder, the friction blocks 7 moving -faster than the inner wedge block -6 owing to the steeper inclines thereon, and all of, these parts, e.,.the' inner block 6, the outer friction blocks 7 and the small wedge blocks-5 moving more rapidly than the bufiing point owing to said wedge blocks moving radially inward, due to said blocks moving down the inclines on the buffing member. The relative position of the parts when the apparatus 1s free from pressure and when under pressure are illustrated in Figs. 4 and 4, respectively.

A yoke 2 is attached to the draw bar a 15, as is usual in these constructions,;and the rear end of this yoke embraces and bears upon the rear-.fgllower 12, and with pulling Strains the. action above described is substantiall the same, the cylinder being moved longitudinal axes directed transyersely of.

clines 8, and becausenofutlfis theQwe'dzoi ,tend to: cause' Inleg. the .-central 7'0 tions.: This tendency will 'foroe 'th'e' friction" blocks 7 tight-against the cyl'inderwall, and

orward in relation t"o'- tl;1e butting block. I The wedge blocks lie with their blocks'will have a quick release when the strains" arerel ieved, and jamming .of they wedge blocks will be thereby prevented. ,.The inner-end of the buffing block 1 ter-i minates in .a head-16 einbracin the' inner, ends of'thewedge block-sg'f-whic '..will re -vent their displacement, and limiting I inwaiid-positions inrelatio'ri tel-each other; l n --Figs. 4 an'df4-F I sho'wmniy invention organized to 'occu'py little" space lon itudinally of theicar adapting itgtp be used in the same spaceoccupied-by' the ordinary A buffing spring in some forms of -cars.' ,In this; form the central wedge'block ,6 is

'for1ned holl0w,and receives the spring, thus shortening the length-pf the aparatusi f. Ldo notevish to l-iniit niysel tothe wedge blocks-as the means interposed betweenthe f friction blocks for moving, themin' opposite be used, such, for instance, as'in- Fig. '5, where rocker or fulcrunied members 17 may be employed, inlwhich' case the liufiingblock; would not have the wedge sliapedtface;Y 5" ltwillbeuobse'rved w ere fI emplo"";the

wedge blocks each'has three inclined 'sur-i faces fitting respectively the incline on the buffing block, 'that on the neutral -wed' e block, and that ion the cuter friction bloc For releasing, dependence lisfihad on'the v angle or incline 4, this being-substantially a degree angle, though a150'degree, and,

p in some cases, a egreeian le willsecure pro er release of the parts: a 45, degree ang e, the forward and outward pressure'. will always be thesarne; consequently, there will beynosticking; ,i .I I 'I claim as'my invention 1. In a draw gear, a casin a central wedge block, a plurality of friction blocks between the central block and the casing, and having inclines contacting with inclines on the central block, a buffing block, and a plurality of members interposed between the central block and the outer blocks, and borne upon. 'theIbufling block to exert pressure '-upon the central wedge'block and outer friction,blocks in opposite directions, substantially as described. I

1 2. In a draw gear, the combination of a casing, a central wedge block,'a plurality of friction blocks between the friction block andthe casing, said blocks having contacting inclines, a bufiing block, and a plurality of "wedgeeshaped members interposed between the central wedge block and the outer friction blocks, said bailing block having in clines bearing on the inclines of the said wedge shaped membersQsubstant-ially as described. 3. combination a casing, a central wedge blockfa plurality of friction blocks betweflfl the same and1 the casing having ing inc ines on the central block operating centrally of with. 1

directions, as other forms-of members may the draw gear, andjaplurality ofmembers interposed .betweenythe central wedge block l and the outside friction blbclgsfor exerting,

pressure upon-them in opposite directions, subst' antially'as described-,-

, 4x111 combination-Ital,easing, .a' central wedge block,";i},*plurality of fr1etion blocks )between thesame and the'casing" havin in- ;clinesengagin inclines on the-central b 00k, "a bufing. bloc: operating centrallyofthe .d'rll'w gear, and-a plurality ofiwedgeflmemf .bers interposed between tlie eentra wedge block and the outside friction' bloclgs for e'xm er'tingpressure'npon them pp'posite direc t-ions, said bufiingblock' having a wedge shaped end bearing-n (m -the substantially as descri ed;v '5. In combinationiin a-draw gear, a gas-f ing, a central wed .e' block, aypluralitypof outer' friction'bloc s bet-ween the centraljl g ing substantially centrally ofthe'casing, and.. I wedges interposed between'the centralwedge block and the outer friction blocks,= and mov able outwardly, and inwardly'. in red 7 t tothe axial center of the 'casing,land a. ufiing blockl'for operating the wedges'to exert pressu'r'e upon the central wedge bloclrand. outer friction blocksinopposite directions, said, friction blocks having contacting inolines, substantially as described; 6; In. combinationfa casin jafcentral w'edge block, a plurality of .frict-ion blocks disposed ab'outthe centra;l- -blo'ck,kand betwe'enthe same and ,Vtlie' easing,"a centrally ,disposed 'bufiing block ha -inclines and wedges disposed about the Eu g blo'ck and interposed between the c'nti'ahwed e block I and the outer friction blockeFsai wedge blocks having inclines, one obtuse and one ariaite in respect to the axis o'ff the-apparatus, and bearing respectively upon corresponding inclines of the central-block andthe outer block, .said wedges having also inclines bearing V upon the correspondin clines of the bufiing block, substantial y vdescribed. 5 l ,7. In combination in a drawgear, :1 casing, acentral wedge block within the casing having inclined faces, friction blocks dispose about the central wedgeblock bearing on the casing and having inclines faces bearing on those of the central wedge block said wedge block having also inclined faces at its end, a. bufiingblock having an inclined face the angle of which in respect to the axis of the appara tusis different from that of the end inclines on the central wedge block, and wedge blocks interposed between the said bufiing block the said central wedge block and the said friction blocks, and havingdifierential inclines common to those of the bufiing block, the end of the wedge block and the, friction blocks, substantially as described.

blockand-Ithe casing=,-a;bulfing block operatin- 110 a 8. In a draw gear, the combination of a 119 casing tapering inwardly, a centralwedge block, fI'lCtlOIl blocks between the wedge block and the tapering wall of the casing, and having the inclines on their inner faces which bear on the central wedge block steeper than theincline of their; outer faces' bearing on the tapered wall of the cylinder;

a bufling block and a plurality of wedge shaped members interposed between the central Wedge block and the outer friction blocks and havin inclines borne upon by inclines of the bung block, substantially as described.

In testimon whereof, I aflix my signature in presence 0 two witnesses.

JOHN F. :OQURSON.

' Witnesses: I

Jnssn D. SNYDER,- Gnono'n G. COSTELLO.

Copies of this patent may be obtained for five cents each, by Washington, D. 0.

addressing the Commissioner ot latents- 

